Our dry-season survey yielded interesting results regarding detectability of certain ungulate species during different seasons. We noticed an increased ability to detect reedbucks, steenboks, and bushbucks. These antelopes are normally hidden in swamps (reedbucks), tall grasses (steenboks) or thick bushes (bushbucks). The lack of dense, tall vegetation allowed us to count substantially more of these animals than during any other season. Estimating detectability of each species in different vegetation types will allow us to accurately estimate their seasonal abundances. We provide this important information to Tanzanian wildlife authorities and national park staff as part of our long-term ungulate monitoring program.